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Dictionary of Medical Acronyms & Abbreviations

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[ X ]

  • X  androgenic [zone]; cross; crossbite; exophoria distance; exposure; extra; female sex chromosome; ionization exposure; ionization exposure rate; Kienböck's unit of x-ray exposure; magnification; multiplication times; reactance; removal of; respirations [anesthesia chart]; Roman numeral ten; start of anesthesia; "times"; translocation between two X chromosomes; transverse; unknown quantity; xanthosine; X unit; xylene
  •   sample mean
  • X2, χ2  chi-square
  • X3  orientation as to time, place, and person
  • x  except; extremity; horizontal axis of a rectangular coordinate system; mole fraction; multiplication times; position; roentgen [rays]; sample mean; "times"; unknown factor; xanthine
  • Ξ  see xi
  • ξ  see xi
  • XA  xanthurenic acid; x-ray analysis
  • X-A  xylene and alcohol
  • Xa  activated factor X; chiasma
  • Xaa  unknown amino acid
  • XAD  External Atrial Defibrillation [trial]
  • Xam  examination
  • Xan  xanthine
  • Xanth  xanthomatosis
  • Xao  xanthosine
  • XBP  xanthophyll-binding protein; X-box binding protein
  • XBSN  X-linked bulbospinal neuropathy
  • XC, Xc  excretory cystogram
  • X-CAR  cross-relational computer-based retention
  • XCCL  exaggerated craniocaudal lateral [view]
  • XCE  X-chromosome controlling element
  • X-CGD  X-linked chronic granulomatous disease
  • XCMD  external [computer] command
  • Xcv  Xanthomonas campestris vesicatoria
  • XD  x-ray diffraction
  • XDH  xanthine dehydrogenase
  • XDP  xanthine diphosphate; xeroderma pigmentosum
  • XDR  transducer
  • Xe  electric susceptibility; xenon
  • XECT, XeCT  xenon-enhanced computed tomography
  • XEF  excess ejection fraction
  • XES  x-ray energy spectrometry
  • Xfb  cross-linked Gibrin
  • XFD  x-ray flat detector
  • XGP  xanthogranulomatous pyelonephritis
  • XGPT  xylosylprotein-4-beta-galactosyltransferase
  • XGRAIL  Gene Recognition and Analysis Internet Link X window [client server system]
  • Xi  inactive X chromosome
  • Ξ  Greek capital letter xi
  • ξ  Greek lowercase letter xi
  • XIBV  Xiburema virus
  • XIC  X chromosome inactivation center; X-inactivation center
  • X-IEP  crossed immunoelectrophoresis
  • XIMS  extensible markup language [XML] information management system
  • XINV  Xingu virus
  • XIP  exchanger inhibitory peptide; x-ray-induced polypeptide; x-ray in plaster
  • XISHF  Xamoterol in Severe Heart Failure [study]
  • XIST  inactive X chromosome specific transcript; X-inactivation specific transcript
  • XL  excess lactate; X-linked [inheritance]; xylose-lysine [agar base]
  • XLA, X-LA  X-linked agammaglobulinemia
  • XLAS  X-linked aqueductal stenosis
  • XLCM  X-linked dilated cardiomyopathy
  • XLD  X-linked dominant; xylose-lysine-deoxycholate [agar]
  • XLH  X-linked hydrocephalus; X-linked hypophosphatemia
  • XLHED  X-linked hypohidrotic ectodermal dysplasia
  • XLI  X-linked ichthyosis
  • XLMR  X-linked mental retardation
  • XLMTM, XLMTm  X-linked myotubular myopathy
  • XLOS  X-linked Opitz syndrome
  • XLP  X-linked lymphoproliferative [syndrome]
  • XLPD  X-linked lymphoproliferative disease
  • XLR  X-linked recessive
  • XLRP  X-linked retinitis pigmentosa
  • XLS  X-linked recessive lymphoproliferative syndrome
  • XLSP  X-linked spastic paraplegia
  • XM  crossmatch
  • Xm, Xm  maternal chromosome X
  • xma  chiasma
  • X-mas  Christmas [factor]
  • x-mat  crossmatch [blood]
  • X-match  crossmatch
  • XME  xenobiotic-metabolizing enzyme
  • XMI  extensible markup language [XML] metadata-interchange [format]
  • XML  extensible markup language
  • XML-DOM  extensible markup language-document object model
  • XML-DTD  extensible markup language-document type definition
  • XMP  xanthine monophosphate
  • XMMR  Xenopus molecular marker resource
  • XMR  X-linked mental retardation
  • XN  night blindness
  • XO  presence of only one sex chromosome; xanthine oxidase
  • XOAD  X-linked ocular albinism with deafness
  • XOAN  X-linked ocular albinism of Nettleship-Falls
  • XOM  extraocular movements
  • XOP  x-ray out of plaster
  • XOR  exclusive operating room
  • XP  xanthogranulomatous pyelonephritis; xeroderma pigmentosum
  • Xp  paternal chromosome X; short arm of chromosome X
  • XPA  xeroderma pigmentosum group A
  • XPC  xeroderma pigmentosum group C
  • XPN  xanthogranulomatous pyelonephritis
  • XPS  x-ray photoelectron spectroscopy; x-ray photoemission spectroscopy
  • XPTB  extrapulmonary tuberculosis
  • Xq  long arm of chromosome X
  • XR  extended release; xeroradiography; X-linked recessive [inheritance]; x-ray
  • x-rays  roentgen rays
  • XRD  x-ray diffraction
  • XRE  xenobiotic response element
  • XRF  x-ray fluorescence
  • XRFDC  x-ray film digitization console
  • XRII  x-ray image intensifier
  • XRMR  X-linked recessive mental retardation
  • XRN  X-linked recessive nephrolithiasis
  • XRS  x-ray sensitivity
  • XRT  x-ray therapy
  • XS  cross-section; excessive; xiphisternum
  • X/S  cross-section
  • xs  excess
  • XSA  cross-section area
  • XSCID  X-linked severe combined immunodeficiency [syndrome]
  • XSCLH  X-linked subcortical laminar heterotopia
  • X-sect  cross-section
  • XSL  extensible stylesheet language
  • XSP  xanthoma striatum palmare
  • XT  exotropia
  • Xt  extra toe
  • Xta  chiasmata
  • Xtab  cross-tabulating
  • XTE  xeroderma, talipes, and enamel defect [syndrome]
  • XTM  xanthoma tuberosum multiplex
  • XTP  xanthosine triphosphate
  • X-TUL  external tumescent ultrasound liposculpture
  • XU  excretory urogram; X unit
  • Xu  X-unit
  • Xu  cumulative amount of urine
  • XUC  extended use case [format]
  • XuMP  xylulose monophosphate
  • Xu5P, Xu5p  xylulose-5-phosphate
  • XX  chromosome X disomy; double strength; female chromosome type
  • 46, XX  46 chromosomes, 2 X chromosomes (normal female)
  • XXL  xylocaine
  • XXX  chromosome X trisomy
  • XXXX  chromosome X tetrasomy
  • XXXXX  chromosome X pentasomy
  • XX/XY  sex karyotypes
  • XY  male chromosome type
  • 46, XY  46 chromosomes, 1 X and 1 Y chromosome (normal male)
  • Xyl  xylose